batgrbproduct Analysis for Trigger=557274
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jun 4 07:59:25 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557274/GCN5_download_cron
======================================================================
Trigger: 00557274 Segment: 000
BAT Trigger Time: 391931983.296 [s; MET]
Trigger Stop: 391931991.488 [s; MET]
UTC: 2013-06-03T05:59:32.666180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 86.9541212664379 Dec: 82.9339151120058 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.2
Image Trigger?: NO
Rate S/N Ratio: 9 [ if not an image trigger ]
Image S/N Ratio: 11.2
Flight Position: [ source = BAT ]
RA: 86.9541212664379 Dec: 82.9339151120058 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 86.8995762479904 Dec: 82.913017101645 [deg; J2000]
{ 05h 47m 35.9s , +82d 54' 46.9" }
+/- 1.26571628671437 [arcmin] (estimated 90% radius based on SNR)
+/- 0.421894668639351 [arcmin] (formal 1-sigma fit error)
SNR: 21.7231883576469
Angular difference between Flight and Ground position is 1.317107 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 83.567999958992 +/- 22.4253927685239
Measured from: -4.26799988746643
to: 79.3000000715256 [s; relative to TRIGTIME]
T50: 31.339999973774 +/- 4.8843816273929
Measured from: 7.3960000872612
to: 38.7360000610352 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.2680000066757
to: 12.2680000066757 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.66399997472763
to: 104.39200001955 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.201195 1.249616 0.755112 0.098292
0.060590 0.063363 0.056977 0.051677 [error]
Peak 0.031241 0.030614 0.025650 0.011549
0.005967 0.006264 0.005563 0.004997 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 3.47e-07 5.18e-07 5.77e-07 1.21e-06 1.81e-06 2.65e-06 erg/cm2
Error 3.37e-08 3.09e-08 5.67e-08 2.49e-07 1.28e-07 3.00e-07 erg/cm2
Peak flux Power-law 2.41e-01 2.49e-01 1.82e-01 2.15e-01 7.55e-01 8.87e-01 ph/cm2/s
Error 7.64e-02 4.92e-02 4.65e-02 1.13e-01 1.43e-01 1.77e-01 ph/cm2/s
Fluence Cutoff-PL 3.40e-07 5.26e-07 5.77e-07 9.09e-07 1.78e-06 2.35e-06 erg/cm2
Error 2.92e-08 3.79e-08 5.83e-08 1.51e-07 5.40e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.38e-01 2.51e-01 1.83e-01 1.95e-01 7.53e-01 8.64e-01 ph/cm2/s
Error 8.31e-02 5.58e-02 4.88e-02 1.71e-01 1.46e-01 2.13e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 8.35e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.845 0.120 - - 1.74e-03 1.21e-04 39.340 57
CPL 1.682 0.463 88.9 0.0 2.13e-03 0.00e+00 38.940 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.451 0.341 - - 6.13e-03 1.22e-03 58.340 57
CPL 1.382 1.515 433.7 0.0 6.66e-03 1.49e-02 58.330 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 46.016000 sec.
T50 in the 50-300 keV band: 25.920000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 114.056 -9.664 104.392
T90 83.568 -4.268 79.300
T50 31.340 7.396 38.736
Peak 1.000 11.268 12.268
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
86.8996 +82.9130 0.0088 18.7 -22.1 3.1933 21.7 TRIG_00557274
------------------------------------------
Foreground time interval of the image:
-9.664 37.704 (delta_t = 47.368 [sec])
38.704 104.392 (delta_t = 65.688 [sec])
Background time interval of the image:
-239.296 -57.253 (delta_t = 182.042 [sec])
-56.296 -9.664 (delta_t = 46.632 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-9.664000 37.704000
38.704000 104.392000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84450 ( -0.118157 0.120951 )
Norm@50keV : 1.73898E-03 ( -0.000121911 0.00012032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.34 using 59 PHA bins.
# Reduced chi-squared = 0.6901 for 57 degrees of freedom
# Null hypothesis probability = 9.641064e-01
Photon flux (15-150 keV) in 113.1 sec: 0.243888 ( -0.0147855 0.0148115 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80857e-06 ( -1.26914e-07 1.2848e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-9.664000 37.704000
38.704000 104.392000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68189 ( -0.475753 0.450592 )
Epeak [keV] : 88.9087 ( )
Norm@50keV : 2.12787E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.94 using 59 PHA bins.
# Reduced chi-squared = 0.6953 for 56 degrees of freedom
# Null hypothesis probability = 9.598150e-01
Photon flux (15-150 keV) in 113.1 sec: 0.241439 ( -0.016086 0.016055 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77729e-06 ( -1.52074e-07 1.50152e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-9.664000 37.704000
38.704000 104.392000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.68195 ( 1.55691 0.309878 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 88.9114 ( -39.02 -88.9114 )
Norm@50keV : 2.12723E-03 ( -0.000126444 0.000803724 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.94 using 59 PHA bins.
# Reduced chi-squared = 0.7079 for 55 degrees of freedom
# Null hypothesis probability = 9.502734e-01
Photon flux (15-150 keV) in 113.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.3736 (-0.887301 0.977819)
R^2/D10^2 : 6.77036E-02 (-0.0179157 0.0241242)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.78 using 59 PHA bins.
# Reduced chi-squared = 1.8208 for 57 degrees of freedom
# Null hypothesis probability = 1.516891e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.082e-07 2.392e-08
25- 50 6.141e-07 4.270e-08
50-150 4.601e-07 6.905e-08
15-150 1.282e-06 9.331e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 94.6948 (-20.139 30.2393)
Norm : 1.07570 (-0.095029 0.109907)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.79 using 59 PHA bins.
# Reduced chi-squared = 0.7156 for 57 degrees of freedom
# Null hypothesis probability = 9.482287e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.178e-07 3.223e-08
25- 50 5.434e-07 3.681e-08
50-150 8.533e-07 2.753e-07
15-150 1.715e-06 2.878e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.91759 (-1.24178 1.29867)
R1^2/D10^2 : 0.542279 (-0.270925 0.725612)
kT2 [keV] : 21.5616 (-4.15374 6.69545)
R2^2/D10^2 : 4.86511E-03 (-0.0030693 0.00640343)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.14 using 59 PHA bins.
# Reduced chi-squared = 0.7661 for 55 degrees of freedom
# Null hypothesis probability = 8.984727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.275e-07 9.088e-08
25- 50 5.202e-07 9.664e-08
50-150 8.897e-07 2.578e-07
15-150 1.737e-06 4.449e-07
Peak spectrum fit
Power-law model
Time interval is from 11.268 sec. to 12.268 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45111 ( -0.338235 0.343877 )
Norm@50keV : 6.12858E-03 ( -0.00122773 0.00120428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.34 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.258197e-01
Photon flux (15-150 keV) in 1 sec: 0.755471 ( -0.142574 0.142683 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.86336e-08 ( -1.29899e-08 1.33579e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.268 sec. to 12.268 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38244 ( -1.39012 1.63988 )
Epeak [keV] : 433.722 ( -433.722 -433.722 )
Norm@50keV : 6.66033E-03 ( -0.00174629 0.028088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.33 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.897005e-01
Photon flux (15-150 keV) in 1 sec: 0.753274 ( -0.14672 0.14434 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.82111e-08 ( -1.45181e-08 1.37075e-08 ) ergs/cm2
Band function
Time interval is from 11.268 sec. to 12.268 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.985624 ( 1.21077 1.21077 )
beta : -1.48277 ( 1.47757 0.361743 )
Epeak [keV] : 62.2745 ( -63.0702 9843.39 )
Norm@50keV : 1.29423E-02 ( -0.0083679 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.27 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 55 degrees of freedom
# Null hypothesis probability = 3.560136e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.5775 (-3.55541 5.04625)
R^2/D10^2 : 9.36199E-02 (-0.0595177 0.1547)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.36 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.855080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.183e-09 1.705e-09
25- 50 1.618e-08 6.021e-09
50-150 2.310e-08 1.051e-08
15-150 4.346e-08 1.616e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-103.92 -199.363)
Norm : 3.08657 (-0.580047 0.580677)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.62 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.157502e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.686e-09 4.480e-09
25- 50 1.478e-08 8.580e-09
50-150 3.243e-08 1.890e-08
15-150 5.490e-08 3.160e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23597 (-2.8237 4.68348)
R1^2/D10^2 : 1.19223 (-0.99428 11.6627)
kT2 [keV] : 26.7704 (-10.2716 88.2918)
R2^2/D10^2 : 9.75296E-03 (-0.00952273 0.0375761)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.04 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Null hypothesis probability = 3.638818e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.668e-09 4.474e-09
25- 50 1.390e-08 7.460e-09
50-150 3.675e-08 2.104e-08
15-150 5.832e-08 3.174e-08
Plot creation:
Tue Jun 4 08:18:53 EDT 2013